HP Jornada 430se User Manual page 71

When you connect to your Internet mail service, by default Inbox
downloads only the first 100 lines of each new message to the
Inbox folder. No mail attachments are downloaded.
When you synchronize with your desktop computer, only the first
100 lines of each new message are downloaded. The original
messages remain on the mail server or your desktop computer.
To mark the messages that you want to retrieve
in their entirety
1. Select the message, tap Service, and then tap Retrieve
Full Copy. The icons in the Inbox message list give you
visual indications of message status.
2. The next time you synchronize or connect to your mail
service, the messages you marked are downloaded
completely.
Chapter 7 | Using Channels and Inbox| 65